From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 88D7B15530B for ; Thu, 16 Jan 2025 18:49:36 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1737053376; cv=none; b=EeyDRrZSnz+XffAlJG3ucTxheLSzqHbn5lFr+WImoxmrHaMgfOOKnyiB9xL4YV+kWg0nGhkqfB/AiN+VXYNQtanJki6oiO9Lym7mCdAYfZxP96xP3OI2SNv0Rs1NKpD7p6Ox9jVuUp2bSjsDEPmqT3jdUzyLzjtFpmaxCe4RQ34= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1737053376; c=relaxed/simple; bh=CXm4S2MDiHwKjRpXsJNEK55VTdnrEQSqkB5xqNC/6o4=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=HssXp9aIOBl34/u3M2XTGRhCW9WvWPclR+enhWdvjeXjB6RNeAQzjNSqLC1mEhEhQfJ1y6DyLZvxDDLoNin4ehQwzecxrKWHR8DOK3YSFxmBahV7uTeeKxANnouyDFdIyiv3wl6bEGwHWnUZjxs9BqWeuzkmlZsGVHpmIXBEDDo= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=aVc4MG4D; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="aVc4MG4D" Received: by smtp.kernel.org (Postfix) with ESMTPSA id D428AC4CED6; Thu, 16 Jan 2025 18:49:35 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1737053376; bh=CXm4S2MDiHwKjRpXsJNEK55VTdnrEQSqkB5xqNC/6o4=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=aVc4MG4Dva/7uUdv7P6Vmf6wzdlSlfuXAbF4fbudSUCX3FEFTo9ZNmkBszcBrVfvZ nYPHezZfzC8HIe/otV7XQJAUBzF/e1BNchD0BQcshcX6AGa/bsczfKAY4UJdITERjr EwX2OkHqeqSTZb5qdoj/QucWjUMFlqhSwGvxvyoIaI2hjLLjklQV8kn8f5nBpV2fND /oAYc+i4wxe0GGNqdlzpOMUQwcL1UdAIMKnamlokX4H4PC2NIZsk790eo0KitwNDDc a4dHGQbp6bBkFqxS/4nw2kk1aqKnUefPwy01r1ov7z1gNi98ZJ5aP4slrcfsX2qdS4 7360ak0cNNaUA== From: SeongJae Park To: Usama Arif Cc: SeongJae Park , akpm@linux-foundation.org, damon@lists.linux.dev, linux-mm@kvack.org Subject: Re: [v1 1/2] mm/damon: have damon_get_folio return folio even for tail pages Date: Thu, 16 Jan 2025 10:49:32 -0800 Message-Id: <20250116184932.23409-1-sj@kernel.org> X-Mailer: git-send-email 2.39.5 In-Reply-To: <20250116144436.3947318-1-usamaarif642@gmail.com> References: Precedence: bulk X-Mailing-List: damon@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit On Thu, 16 Jan 2025 14:44:35 +0000 Usama Arif wrote: > This effectively adds support for large folios in damon for paddr, > as damon_pa_mkold/young won't get a null folio from this function > and won't ignore it, hence access will be checked and reported. > This also means that larger folios will be considered for > different DAMOS actions like pageout, prioritization and migration. > As these DAMOS actions will consider larger folios, iterate through > the region at folio_size and not PAGE_SIZE intervals. > This should not have an affect on vaddr, as damon_young_pmd_entry > considers pmd entries. This patch will improve both accuracy of monitoring results and efficiency of DAMOS for paddr use cases on THP-enabled systems. Thank you Usama! > > Signed-off-by: Usama Arif Reviewed-by: SeongJae Park Thanks, SJ [...]